Is the word うち written in Kanji or Hiragana?

Have you ever wondered how you know a certain Japanese word should be written in Kanji or Hiragana?
For example, you may find that a word is written in Hiragana on your textbook but your dictionary app shows it as Kanji.
Which is correct?

I’ll show you the secret of Kanji.

Click the link to get the Official Joyo kanji list by the Agency for Cultural Affairs, Japan
https://bit.ly/3ndNJqY

Let me recommend you some dictionaries published in Japan.

They are written in Japanese but if you are an intermediate learner, it would be nice to start using one of them to master authentic Japanese.

*Disclosure: the links below are affiliate links, meaning, at no additional cost to you, I will earn a small commision if you click through and make a purchase.

Kanji dictionary for Elementary school kids

かんじを　おぼえる　じてん